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1.前自1973年第一次石油冲击以来,节能的呼声急剧增高,节能技术发展很快。进入八十年代,发展更加迅速。其中改善公用程度较大的大型载重车及公共汽车的油耗已成为非常重要的课题。但另一方面,还要适应严格的有关 NOx 排放量的法规。本来,讨论油耗问题时,要涉及到整车,而本文仅以发动机本身的油耗率,特别是以迄今广泛采用的直接喷射式非增压发动机为中心,阐述改善其燃烧的各种措施及随之而产生的问题,同时阐述解决这些问题的技术措施。2.降低油耗的途径为降低汽车的油耗率,应考虑的因素包括提高发动机及传动系的效率,减小风阻与滚动
1. Since the first oil shock in 1973, the voice of energy saving has risen dramatically, and energy-saving technologies have developed rapidly. Into the eighties, the development of more rapid. Among them, the improvement of the fuel consumption of large-scale heavy trucks and buses has become a very important issue. On the other hand, however, it is also necessary to adapt to strict regulations on NOx emissions. Originally, to discuss fuel consumption issues, it is necessary to involve the vehicle, and this article only to the fuel consumption of the engine itself, especially in the so far widely used direct injection non-supercharged engine as the center, to improve its combustion measures and with The problems that arise, at the same time explain the technical measures to solve these problems. 2 ways to reduce fuel consumption In order to reduce vehicle fuel consumption, factors that should be considered include improving the efficiency of the engine and driveline, reducing drag and rolling